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org.bouncycastle.crypto.macs

public Class VMPCMac

extends Object
implements Mac
Class Inheritance
All Implemented Interfaces
org.bouncycastle.crypto.Mac
Imports
org.bouncycastle.crypto.CipherParameters, .DataLengthException, .Mac, org.bouncycastle.crypto.params.KeyParameter, .ParametersWithIV

Field Summary

Modifier and TypeField and Description
private byte
g

private byte
n

private byte[]
P

private byte
s

private byte[]
T

private byte[]
workingIV

private byte[]
workingKey

private byte
x1

private byte
x2

private byte
x3

private byte
x4

Constructor Summary

AccessConstructor and Description
public
VMPCMac()

Method Summary

Modifier and TypeMethod and Description
public int
doFinal(byte[]
the array the MAC is to be output to.
out, int
the offset into the out buffer the output is to start at.
outOff)

Implements org.bouncycastle.crypto.Mac.doFinal.

Compute the final stage of the MAC writing the output to the out parameter.

public String
getAlgorithmName()

Implements org.bouncycastle.crypto.Mac.getAlgorithmName.

Return the name of the algorithm the MAC implements.

public int
getMacSize()

Implements org.bouncycastle.crypto.Mac.getMacSize.

Return the block size for this MAC (in bytes).

public void
init(CipherParameters
the key and other data required by the MAC.
params)

Implements org.bouncycastle.crypto.Mac.init.

Initialise the MAC.

private void
initKey(byte[] keyBytes, byte[] ivBytes)

public void
reset()

Implements org.bouncycastle.crypto.Mac.reset.

Reset the MAC.

public void
update(byte
the byte to be processed.
in)

Implements org.bouncycastle.crypto.Mac.update.

add a single byte to the mac for processing.

public void
update(byte[]
the array containing the input.
in, int
the index in the array the data begins at.
inOff, int
the length of the input starting at inOff.
len)

Implements org.bouncycastle.crypto.Mac.update.

Inherited from java.lang.Object:
cloneequalsfinalizegetClasshashCodenotifynotifyAlltoStringwaitwaitwait

Field Detail

gback to summary
private byte g
nback to summary
private byte n
Pback to summary
private byte[] P
sback to summary
private byte s
Tback to summary
private byte[] T
workingIVback to summary
private byte[] workingIV
workingKeyback to summary
private byte[] workingKey
x1back to summary
private byte x1
x2back to summary
private byte x2
x3back to summary
private byte x3
x4back to summary
private byte x4

Constructor Detail

VMPCMacback to summary
public VMPCMac()

Method Detail

doFinalback to summary
public int doFinal(byte[] out, int outOff) throws DataLengthException, IllegalStateException

Implements org.bouncycastle.crypto.Mac.doFinal.

Doc from org.bouncycastle.crypto.Mac.doFinal.

Compute the final stage of the MAC writing the output to the out parameter.

doFinal leaves the MAC in the same state it was after the last init.

Parameters
out:byte[]

the array the MAC is to be output to.

outOff:int

the offset into the out buffer the output is to start at.

Exceptions
DataLengthException:
if there isn't enough space in out.
IllegalStateException:
if the MAC is not initialised.
getAlgorithmNameback to summary
public String getAlgorithmName()

Implements org.bouncycastle.crypto.Mac.getAlgorithmName.

Doc from org.bouncycastle.crypto.Mac.getAlgorithmName.

Return the name of the algorithm the MAC implements.

Returns:String

the name of the algorithm the MAC implements.

getMacSizeback to summary
public int getMacSize()

Implements org.bouncycastle.crypto.Mac.getMacSize.

Doc from org.bouncycastle.crypto.Mac.getMacSize.

Return the block size for this MAC (in bytes).

Returns:int

the block size for this MAC in bytes.

initback to summary
public void init(CipherParameters params) throws IllegalArgumentException

Implements org.bouncycastle.crypto.Mac.init.

Doc from org.bouncycastle.crypto.Mac.init.

Initialise the MAC.

Parameters
params:CipherParameters

the key and other data required by the MAC.

Exceptions
IllegalArgumentException:
if the params argument is inappropriate.
initKeyback to summary
private void initKey(byte[] keyBytes, byte[] ivBytes)
resetback to summary
public void reset()

Implements org.bouncycastle.crypto.Mac.reset.

Doc from org.bouncycastle.crypto.Mac.reset.

Reset the MAC. At the end of resetting the MAC should be in the in the same state it was after the last init (if there was one).

updateback to summary
public void update(byte in) throws IllegalStateException

Implements org.bouncycastle.crypto.Mac.update.

Doc from org.bouncycastle.crypto.Mac.update.

add a single byte to the mac for processing.

Parameters
in:byte

the byte to be processed.

Exceptions
IllegalStateException:
if the MAC is not initialised.
updateback to summary
public void update(byte[] in, int inOff, int len) throws DataLengthException, IllegalStateException

Implements org.bouncycastle.crypto.Mac.update.

Parameters
in:byte[]

Doc from org.bouncycastle.crypto.Mac.update.

the array containing the input.

inOff:int

Doc from org.bouncycastle.crypto.Mac.update.

the index in the array the data begins at.

len:int

Doc from org.bouncycastle.crypto.Mac.update.

the length of the input starting at inOff.

Exceptions
DataLengthException:

Doc from org.bouncycastle.crypto.Mac.update.

if there isn't enough data in in.

IllegalStateException:

Doc from org.bouncycastle.crypto.Mac.update.

if the MAC is not initialised.